The 53AAA-B24-A13L is a sealed 1/2" (12.5 mm) square control potentiometer manufactured by Bourns, designed for professional audio and general control applications. This model features a conductive plastic element with linear taper and ±10% tolerance, offering a standard resistance range from 1 kO to 1 megohm. The potentiometer is RoHS compliant and sealed for board washing, with a metal bushing and shaft, and includes an anti-rotation lug (90° CW style) and front bracket for secure mounting. It provides an effective electrical angle of 270° ±5° with independent linearity of ±5%, and an absolute minimum resistance of 2 ohms maximum. The device is suitable for audio equipment, mixing consoles, and other professional control applications where sealed construction and reliable performance are essential.